This page is being served from the Urological Sciences Research Foundation web repository, and was originally posted between 1996-2008. In January 2009 USRF’s founder, Dr. Leonard S. Marks and his staff joined UCLA’s Department of Urology where they are continuing their research. Click for more information.

Slide 10 of 18

Since prostate volume is reflected in serum PSA levels (assuming cancer has been excluded), the PSA test can be used to help define risk in individual patients. In this example, a 50 year old man with a PSA of 4.0 ng/ml would be expected to have a prostate volume of approximately 45 cc; if that man were 75 y.o, he would be expected to have a prostate volume of 55 cc. Prostate volume and age are the primary determinants of serum PSA levels, under normal conditions.